Switch Company

How do I change into another one if I have more than one company I operate in new QuickBooks Online?

From the home page screen

Select the Company Gear (located at upper-corner)

Select “Switch Company” under Your Company heading

It will take you to login screen with the following messages:
Company Selection
Our records show that you have access to more than one company, or multiple users in the same company.QuickBooks Online Companies
newqbo (example)
oldqbo (example)
futureqbo (example)Canceled Companies
Oldco (example)

Switch Company

How to add multiple companies in QBO like QB desktop version?

Unlike QuickBooks desktop version (where you can create as many multiple company files as you want), QuickBooks Online plus is per one company file subscription. You can only have one business or company file in one paid subscription account. You can have multiple businesses with additional PAID subscriptions added under your same login name.
They give you some minimum discount for 2nd company file (20% discount), and for 3rd company and above (30% discount). Discount rate may vary from time to time.
There is no question this is the biggest disadvantage of having QuickBooks Online Plus service and paying $39.95 subscription fee per month forever. Oh, that is paying $2,397.00 to Intuit in five years.
They should offer at least 50% discount for 2nd company file subscription. That’s fair and reasonable pricing!!